Hello and welcome, Pete.
Thanks for posting good images directly - much appreciated!
Are there any marks on the base at all?
Can we please see a pic of the base, even if it looks as if there's "not much there" the precise sort of "not much there" can be very informative.
It does seem very Scandanavian to me, but that's not my area. Somebody else, I am sure will be able to help.
It is a very distinctive and rather wonderful thing you have there.